A company has four offices numbered 1, 2, 3 and 4. Each office has exactly one computer and one printer. Each of these eight machines was bought in either 2019, 2020 or 2021. (i) In all offices, computers are bought earlier than printers or in the same year. (ii) Computer in office 2 and printer in office 1 are bought in the same year. (iii) Computer in office 3 and printer in office 4 are bought in the same year. (iv) Computer in office 2 and computer in office 3 are not purchased in the same year. (v) Computer in office 1 and printer in office 3 are purchased in the same year 2020.

If the computer and printer in office 3 are bought in the same year, then the computer in office 4 is bought during